The color of Bee Larkham's murder

Jasper Wishart has a condition where he sees colors when he hears sounds, so everything and everyone has their own unique color. Recently, Jasper sees a color he becomes haunted by; the color of murder. He is convinced that he has murdered his neighbor, Bee Larkham, so he tries to piece together the events leading up to the crime. But someone else is out there determined to stop him from finding out the truth.